ICD-10-CM Diagnosis Code A03.1: Shigellosis due to Shigella flexneri

A03.1

A03.1 is a billable and specific ICD-10-CM code. Accurate coding of A03.1 ensures proper diagnosis, effective treatment, and correct reimbursement. 

This guide provides key details about its use, official guidelines, and historical background.

ICD-10-CM Code for Shigellosis due to Shigella flexneri

The ICD-10-CM Diagnosis Code for Shigellosis caused by Shigella flexneri is A03.1. This infection is caused by Shigella flexneri, a bacterium that leads to intestinal inflammation and dysentery. 

Proper documentation using A03.1 ensures patients receive appropriate care and enables accurate healthcare reimbursement.

Synonyms:

  • Shigella flexneri enteritis
  • Dysentery caused by Shigella flexneri
  • Shigella flexneri infection

History Background of ICD-10-CM Diagnosis Code A03.1

The ICD-9-CM system, first introduced in 1979, provided the initial framework for coding diseases and health-related conditions in the United States. 

The ICD-9-CM code for Shigellosis due to Shigella flexneri is 004.1. This coding remained consistent from 1979 to 2015.

While the ICD-9-CM system offered a basic approach to disease classification, it needed more detail and specificity for modern healthcare needs. 

To address this, the ICD-10-CM system was launched in 2015, introducing a more comprehensive and accurate coding structure. 

The transition from ICD-9-CM to ICD-10-CM significantly improved the ability to document and analyze conditions like shigellosis due to Shigella flexneri.

YEARCODEDESCRIPTION
2020A03.1No Change
2021A03.1No Change
2022A03.1No Change
2023A03.1No Change
2024A03.1No Change
2025A03.1No Change

Symptoms of Shigellosis due to Shigella flexneri:

  • Watery or bloody diarrhea
  • Stomach cramps
  • Fever
  • Nausea and vomiting
  • Fatigue due to dehydration
  • Painful bowel movements

How Shigellosis due to Shigella flexneri is Caused

Shigellosis occurs when Shigella flexneri bacteria infect the intestines. Common sources include:

  • Eating contaminated food or drinking contaminated water
  • Direct contact with infected individuals or surfaces
  • Poor hygiene, especially in settings with crowded living conditions

Other ICD-10-CM Diagnosis Codes in A03

ICD-10-CM code A03 | Shigellosis has following sub categories including A03.1 :

  • A03 Shigellosis.
  • A03.0 Shigellosis due to Shigella dysenteriae.
  • A03.1 Shigellosis due to Shigella flexneri.
  • A03.2 Shigellosis due to Shigella boydii.
  • A03.3 Shigellosis due to Shigella sonnei.
  • A03.8 Other shigellosis.
  • A03.9 Shigellosis, unspecified.

Final Thoughts

Proper coding of A03.1 is vital for diagnosing and managing Shigellosis caused by Shigella flexneri. Understanding its symptoms, causes, and history helps ensure accurate documentation and better patient care. This code plays a key role in improving patient care and ensuring appropriate healthcare reimbursement.

About Author
content writer
Dr. Sehrish Bano, CPB & CPC

As a certified professional in both billing and coding, I specialize in streamlining healthcare revenue cycles and ensuring accurate claim submissions. With more than five years of experience serving the healthcare industry in the USA, I bring expertise in coding accuracy, compliance, and reimbursement optimization. My work focuses on reducing errors, improving efficiency, and supporting providers in delivering quality care without administrative hurdles. I am committed to helping healthcare organizations achieve financial stability and compliance through reliable billing and coding practices.

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